Official Series Playlist

Set it in Studio, inside the playlist's own settings. Marking a playlist as an official series tells YouTube the videos in it form one continuous body of work with a running order, and separates it from the loose collections most channels assemble. It suits a genuine series where episode two follows episode one, a course delivered across uploads, or a multi-part investigation. It does not suit a grab-bag of your strongest videos. The setting is easy to miss, because a playlist works perfectly well without it and everything a viewer notices, the queue autoplaying through and the shared landing page, happens either way.